Sunday

December 21, 2014

December 21, 2014

Posted by **Bassel** on Sunday, December 18, 2011 at 7:24pm.

formula = mivi+m2v2= mivi+m2v2

so far I have something like this: m(+4m/s)m2(+2m/s) = m2(+2m/s)+v2. I believe it is wrong.

- Physics, science -
**drwls**, Sunday, December 18, 2011 at 9:59pmThe balls exchange speeds in an elastic head-on collision. Thus the second ball leaves at 4 m/s.

Note that total momentum and kinetic energy are conserved as a result. No other final velocity conserves both. The result than Ball #1 leaves at 2 m/s could have been predicted by solving both equations.

**Answer this Question**

**Related Questions**

Physics - A billiard ball traveling at 3.00 m/s collides perfectly elastically ...

physics - A 0.060 kg tennis ball, moving with a speed 2.50 m/s, collides head on...

physics - A stationary billiard ball, mass 0.17 kg, is struck by an identical ...

physics - croquet ball must have a set mass of 0.50 kg. a red ball moving at 10....

Physics - Problem 3- A 10-g metal ball is moving to the left with a velocity of...

physics - Two billiard balls of equal mass move at right angles and meet at the ...

physics - A white billiard ball with mass mw = 0.1 kg is moving with a speed of ...

physics - A white billiard ball with mass mw = 1.32 kg is moving directly to the...

Physics - A stationary billiard ball, mass 0.17 kg, is struck by an identical ...

physics - A billiard ball rolling across a table to the right at 2.2 m/s makes a...